i love when they do duets between the members!!! a very soothing song, also yes those "shared"/"all" lines would be counted as both of them in the line distribution since its just tiff's adlibs over taeyeon's line they're only counted as "shared" cuz she sings at the same time taeyeon sings her line

Members + Color Codes

Taeyeon (Purple)
Jessica (Dark Blue)
Sunny (Orange)
Tiffany (Pink)
Hyoyeon (Green)
Yuri (Red)
Sooyoung (Light Blue)
Yoona (Yellow/Gold)
Seohyun (Teal)

Release Date: January 1, 2013
My Bias: Tiffany, Yuri, Yoona

Han: https://colorcodedlyrics.com/2013/01/02/girls-generation-sonyeosidae-lost-in-love-yuliai/
Rom: https://colorcodedlyrics.com/2013/01/02/girls-generation-sonyeosidae-lost-in-love-yuliai/
Eng: https://popgasa.com/2013/01/02/girls-generation-snsd-lost-in-love-유리아이/